BluNote Plus Chat Wireless Speaker offers a full-range music playback in MP3 players and professional telephone conferencing through the high-quality, dual MEMs microphones with impedance matching. DSP with noise and echo cancellation, along with a passive radiator and dual speakers, allow a natural-sounding voice in Bluetooth-paired, cell phone conversations. Compact design fits easily in a briefcase. Wireless speaker is rechargeable with Lighter Capacitive Touch Panel Controls (not included). Music playback is enhanced by innovative, audio compression technology, APT-X by CSR, producing audio quality that is indistinguishable from a wired device.